国内生产率与进口多样性收益分析

Productivity and Domestic Trade Variety

基于生产率与进口多样性的内生关联模型以及Feenstra（1994）的多样性度量思路，本文经验考察发现，我国2000～2009年期间的初级品和制成品两个进口多样性总体保持增长的态势，但存在由东向西呈现出阶梯型下降的区域不平衡特征。实证估计发现，通过研发的技术进步有利于缓解我国对中间品多样性的进口依赖，并增强对最终新产品的引进程度和吸收能力。贸易壁垒总体上不利于我国进口多样性的提升，中间（要素）品多样性进口的壁垒敏感度低于最终品进口多样性，研究启示在于我国的贸易政策调整需要鼓励紧缺型中间品的多样性进口，而适当控制与国内重复竞争的外部最终品多样性进口。

Based on the model of productivity and imports' variety and Feenstra( 1994) measure method,this paper investigates the sample of primary products and manufactured goods during 2000 ~ 2009 and finds that both import varieties show a increasing trend. The empirical result shows that technological progress through R&D can help new goods absorption capacity in China. Trade barriers are generally not conducive to enhancing the diversity of China's imports of intermediate product. The suggestion is that policy should focus on encouraging the import of intermediate goods variety.